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Preparation of biochar-modified ferrocobalt bimetallic composite catalyst and application of biochar-modified ferrocobalt bimetallic composite catalyst in catalytic degradation of tetracycline

A composite catalyst, bimetallic technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the limitation of antibiotic wastewater application and hinder the surface active site of catalyst , two-dimensional catalysts are easy to agglomerate and accumulate problems

Pending Publication Date: 2022-05-03
LANZHOU UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, two-dimensional catalysts are extremely prone to agglomeration and accumulation, which hinders the active sites on the catalyst surface and limits its application in antibiotic wastewater.

Method used

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  • Preparation of biochar-modified ferrocobalt bimetallic composite catalyst and application of biochar-modified ferrocobalt bimetallic composite catalyst in catalytic degradation of tetracycline
  • Preparation of biochar-modified ferrocobalt bimetallic composite catalyst and application of biochar-modified ferrocobalt bimetallic composite catalyst in catalytic degradation of tetracycline
  • Preparation of biochar-modified ferrocobalt bimetallic composite catalyst and application of biochar-modified ferrocobalt bimetallic composite catalyst in catalytic degradation of tetracycline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] (1) The biomass bagasse (BM) was repeatedly washed with deionized water and ethanol. Dry in an oven at 80°C for 24 hours, and grind for later use.

[0095] (2) BM, 2 mmol Co(NO 3 ) 2 ·6H 2 O and 1 mmol Fe(NO 3 ) 3 9H 2 O was added to 100 mL deionized water and stirred for 30 min to make it evenly dispersed. Control the mass ratio of BM to the total mass of cobalt and iron to be 1:2. Subsequently, through 7mmol NaOH and 3mmol Na 2 CO 3 Adjust the pH of the mixed solution to 10-10.5. After sonicating for 30 min, stir at 65 °C for 24 h. The resulting precipitate was repeatedly washed with ultrapure water and ethanol. Then, the precipitate was frozen with liquid nitrogen and placed in a freeze dryer for 24 h to form BM 1 @CF 2 LDH.

[0096] (3) will BM 1 @CF 2LDH was placed in a tube furnace under the protection of nitrogen, and annealed at 500 ° C for 2 hours to obtain BC 1 @CF 2 c. BC 1 @CF 2 The C / PMS system effectively degraded 92.49% of TC (20 mg / L...

Embodiment 2

[0098] In step (2), the mass ratio of BM to the total mass of cobalt and iron is controlled to be 1:1, and BM is formed in step (2) 1 @CF 1 LDH, finally get BC in step (3) 1 @CF 1 C, all the other steps are the same as in Example 1. BC 1 @CF 1 The C / PMS system can effectively degrade 90.04 % of TC (20 mg / L) within 30 min.

Embodiment 3

[0100] In step (2), the mass ratio of BM to the total mass of cobalt and iron is controlled to be 2:1, and BM is formed in step (2) 2 @CF 1 LDH, finally get BC in step (3) 2 @CF 1 C, all the other steps are the same as in Example 1. BC 2 @CF 1 The C / PMS system can effectively degrade 87.12% of TC (20 mg / L) within 30 min.

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Abstract

The invention provides preparation of a biochar-modified ferrocobalt bimetallic composite catalyst and application of the biochar-modified ferrocobalt bimetallic composite catalyst in catalytic degradation of tetracycline. On the basis of an advanced oxidation process of transition metal activated persulfate (PMS), agricultural waste bagasse and Co-Fe LDH serve as precursors, and the magnetic recyclable porous charcoal modified ferrocobalt bimetallic composite catalyst is successfully prepared through a coprecipitation and calcination method. Tetracycline (TC) is selected as a target pollutant, and the catalyst shows high reaction activity in the TC removal process. The remarkable performance is benefited from the synergistic effect of cobalt and iron bimetals in the composite catalyst, the activation effect of PMS is enhanced, sulfate free radicals (SO4 <->) and hydroxyl free radicals (. OH) are generated, and TC is further oxidized. The BC-coated CFC has the advantages of environmental friendliness, high catalytic activity, sustainability and the like, and has good environmental application value.

Description

technical field [0001] The invention belongs to the field of material preparation and refractory organic wastewater treatment, and relates to a preparation method of a biochar-modified cobalt-iron bimetallic composite catalyst. The invention also relates to the catalytic degradation of tetracycline by the biochar-modified cobalt-iron bimetallic composite catalyst application. Background technique [0002] The resistance and high residue of antibiotics in the water environment seriously threaten the ecological environment and human health. Currently, the most common methods for removing antibiotics from water include physical adsorption, photocatalysis, electrochemistry, and advanced oxidation processes (AOPs). As an advanced oxidation process, AOPs has remarkable mineralization rate and adaptability to refractory organic pollutants. Among them, the use of transition metals to activate peroxymonosulfate (PMS) or persulfate (PS) to generate sulfate radicals (SO 4 •- ) and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J37/03B01J37/32B01J37/08C02F1/72C02F101/34C02F101/38
CPCB01J23/75B01J37/03B01J37/32B01J37/088C02F1/725C02F1/722C02F2101/34C02F2101/345C02F2101/38C02F2305/023Y02W10/37
Inventor 景凌云朱浩杨文涵
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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